code: def reset_key(self):
      self._obj_set("_key", None)
      return self
  
imports: from typing import Dict, Tuple, Type
  from ..serialization.serializables import Serializable, StringField
  from ..serialization.serializables.core import SerializableSerializer
  from ..utils import tokenize
label_desc: Use image node_id 8 for calling the Base obj's underlying member method code with example usage: obj.reset_key() and returns: self